3%In doped TiO₂ nano–material was prepared by sol–gel method, and powder X–ray diffraction (XRD), scanning electron microscope (SEM), FT–IR, and N₂ adsorption–desorption were employed to characterize the material calcined at different temperature. Photocatalytic degradation of methyl orange under UV–light irradiation on the materials was also examined. The results show that all the samples present anatase TiO₂ phase, and no apparent impact on surface morphology of the samples was
observed. With increasing calcination temperature, TiO₂ crystallite size and average pore size increased gradually, while the special surface area decreased. The special surface area and average pore size are 94.4 m²/g and 10.3 nm for the 3%In–TiO₂ sample calcinated at 400^oC. Meanwhile, the sample also have the optimal photocatalytic degradation activity, and methyl orange degradation rate is 43.1% after 30 min of UV–light irradiation.

The effect of welding heat input on the microstructure and properties of X100 pipeline steel was studied. The results show that with the increase of heat input, the strength and toughness of X100 pipeline steel decrease due to the decrease of acicular ferrite in the weld zone and the coarser grains in HAZ. The smaller heat input can reduce the width, and increase the hardness in HAZ. The impact energy and the shear area of joints decrease with increasing heat input. The impact fracture is quasi-cleavage fracture. The microstructure of weld zone is mainly made up of acicular ferrite and granular bainitic which could bring excellent strength and toughness. The microstructure of HAZ has larger changes because of difference of the cooling rate under different welding heat input.

A porous TiO₂ /HA/TiO₂ composite coating was prepared on the surface of a porous NiTi alloy by mixed sol method. The release rates of Ni ion of the porous NiTi alloy of different porosity ratios in the composite coatings in a simulated body fluid decrease markedly compared with the uncoated alloys. The composite coatings have better biological activity than that of a single–layer coating and then can induce the growth of apatite quickly. The release characteristics of gentamicin sulfate loaded on the
porous NiTi alloy was also investigated. The results show that the porous NiTi alloy can control the release of drugs by means of the special pore structure, and the drugs show a slow and controlled release pattern.

Excess CaO type non-stoichiometric calcium zirconate was prepared by a co-precipitation method, and the impedance properties was investigated by AC impedance determination. The results show that precursor powder can be synthesized into pure orthorhombic CaZrO₃, the total electrical conductivity significantly increases with temperature increases, and the activation energy was calculated to be 1.17eV. Both relaxation time and capacitance decrease dramatically with the rising of temperature. The permittivity of grain boundary was found higher than that of grain at low temperature. In this way, the heterogeneous distribution of oxygen vacancies was indicated, and the doping mechanism of CaO in Ca_1−xZrO_3−δ matrix was deduced to be heterogeneous. However, permittivity decreases evidently with temperature rises, which
suggests the oxygen vacancies distribute more homogeneously at higher temperature.

Finite element analysis was used to analyze thermal stress distribution in CF/BMI composite under exposure to thermal cycles. Parabolic failure criterion was used to predict the potential failure zone in composite. Birth and death element technique was used to reveal the microcracks distribution in composite induced by thermal stress. Thermal stress at composite free end zone is higher than that in inner zone, and the maximum stress locates at the fiber surface in resin-rich area of free end zone.
The potential failure zones locate at free end zone with the microcracks distributed along the interface, thus leads to interfacial debonding failure in composite. During the following thermal cycle, the thermal stress which is alleviated to some extent and redistributed, extends from free end zone to inner zone, thus exacerbates the degree of interfacial debonding. Properties evolution of CF/BMI composite subjected to thermal cycles were investigated, showing that the interfacial bond property was decreased due to the formation of microcracks along the interface. The numerical simulation results are in good agreement with the experiment results, which reasonably expect the potential failure zone in composite and analyze the reason of decrease in interfacial bond property induced by thermal cycles.

The method of electro–deoxidation in molten salts was adopted to to prepare Ti with unsintered TiO₂ powder loaded in the graphite capsule, and the graphite crucible was used as electrolytic cell at 800^oC . In this paper, different electro–deoxidation time were taken as to analyse the cathode products. During the CV experiment, the graphite and molybdenum was individually used as the work electrode material, counter electrode material and reference electrode material for the Studies on Kinetics
of TiO₂ reduction and the CV curves were recorded by AutoLab PGSTAT 320 N potentiostat. Result showed that metal Ti was gotted with unsintered TiO₂ powder as raw material after 40 h constant voltage electrolysis, and graphite electrode was not a good choice to used as electrode material in the CV experiment at high temperature for its high electrode activity and large surface area, although there were a wide electrochemical window potential, while the molybdenum was quite an ideal choice for its stable electrochemical properties. The TiO₂ electrochemical reduction steps contain four steps: TiO₂/Ti₃O₅, Ti₃O₅/Ti₂O₃, CaTi₂O₄/TiO, TiO/T during the former two steps CaTiO₃ and CaTi₂O₄ spontaneously formed.

Two alloys with the different components of trace elements were prepared, and the effects of Sc on the microstructure and texture of Al–Zn–Mg–Cu alloys during hot deformation and solution treatment were investigated. Comparing with the alloy containing only trace Zr, alloy containing trace Sc and trace Zr exhibited following characteristics: after hot deformation, there are smaller sub–grains in the alloy; after solution treatment, the alloy has lower recrystalization fraction, and the density of
{011}<211> (B–) orientation is stronger, while the density of {112}<111> (C–) orientation is weaker. For this reason above all–Al3(Sc, Zr) particles formed during homogenization distribute uniformly in both inner grain areas and grain boundary areas, which severely prohibited the migration of dislocations and grain boundaries during hot deformation and solution treatment. Because of interfacial energy offered from sub–grain boundaries, the precipitation behavior of MgZn2 was promoted. The promotion and strengthen of sub–microstructural result in increase of the final hardness of alloys with the different components of trace elements by 11.3%.

The Friction and wear properties of Ni₃Al (Zr) alloy are investigated in a sliding wear experiment. The results show that with the increase of P^1/2·V, Ni₃Al (Zr) alloy’s wear mechanism gradually transform itself into the oxidation wear mechanism and at the same time both the wear rate and the friction coefficient decrease. The wear mechanism turns into the oxidation wear mechanism when P^1/2·V comes up to 22.7 (N^0.5·m/s). Ni₃Al (Zr) alloy’s good mechanical property at high tempreture plays an important role for the formation of a complete oxide film which can decrease the wear rate and the friction coefficient of Ni₃Al (Zr) alloy.

Polymer complex of polypropylene grafted styrene sulfonic acid–polyaniline(PP–g–SPS–PANI) was prepared by solution grafting to acrylic acid as a dopant and polypropylene (PP) as the matrix. PP–g–SPS–PANI were characterized by fourier transfer infrared spectrometry(FTIR), ZC–90 digital impedance meter and scanning electron microscopy(SEM). The amount of acrylic and initiator to influence on antistatic properties were studied. The results showed that the antistatic properties of PP–g–SPS–PANI increased with the amount of the acrylic and initiator, and then decreased. Acrylic doped so that PANI molecular chain formed charge delocalized conjugated structure and having conductive properties. The complex efficient and antistatic properties of antistatic agents are best when the mass ratio of acrylic with
polypropylene graft styrene sulfonamide acid(PP–g–SPS) macrylic/mPP−g−SPS=7:1, the molar ratio of initiator with aniline nAPS/nANI=2:1. The volume resistivity of PP–g–SPS–PANI/PP blends decreased to 9.5×1012Ω·cm. SEM results show that the interface of PP blends has a good compatibility.

Hollow spherical CaMoO4:Eu3+, Li+ red phosphors were synthesized by spray pyrolysis method, using calcium nitrate, europium oxide, lithium carbonate and ammonium molybdate as raw materials. The crystalline phase, morphology and luminescence properties of the obtained samples were characterized by X-ray diffraction, scanning electron microscopy and photoluminescence emission spectra, and the effects of the pyrolysis temperature were investigated. The results show that the emission intensity
of the samples first strengthens, then decreases with the increase of pyrolysis temperature. The intensity of the sample pyrolyzed at 400  reaches a maximum value. At this pyrolysis temperature, a single phase of CaMoO4 can be obtained and the sample is composed of hollow spheres with an average size of 1.4 μm. The hollow spherical CaMoO4:Eu3+, Li+powders can be excited efficiently by ultraviolet light with the wavelength of 395 nm and visible blue light with the wavelength of 465 nm, and show a strong red emission of 617 nm.

Magnetic hydroxyapatite composite was prepared by coprecipitation method with Fe₃O₄ particles and Ca(OH)₂, and NH₄H₂PO4 as its raw material. The crystal structure and surface morphology of the composite were characterized by means of X-ray diffractometer (XRD), the field emission scanning electron microscopy (FEG-SEM), high--resolution transmission electron microscope (HR-TEM) and Brunauer-Emmett-Teller (BET), respectively. The results show that the composite is homogenous. Fe₃O₄ particles mostly deposite well on the surface of HAp and sometimes incorporated into the HAp material, which leads to the higher specific surface area and better Pb(II) adsorption of the HAp material.

As a modifier, silica sol was introduced into the traditional melamine cyanurate (MCA) preparation process and therewith modified MCA (mMCA) was prepared. mMCA was blended with nylon 6 (PA 6) to prepare flame retardant PA 6 composites and the flame retardant properties were investigated. The results show that silica sol may contribute to the enhancement of flame retardant property. With the increase of silica sol content, the limited oxygen index (LOI) of PA 6/mMCA composites increase firstly
and then decrease, and the self-extinguishing time decreases. In the presence of silica sol, the amount of drippings can be reduced, the formation of non-flame dripping increases and the char structure can be improved.

Distribution of strain and subsequent recrystallization (RX) around indentation in a directionally solidified superalloy DZ125L have been investigated by electron back scatter diffraction (EBSD) and other experimental method. The results show that distribution of strain was extremely homogenous. Deformed area increased with increasing of the load, which resulted in the larger region of RX. According to the distribution of strain on the section of indentation and the critical strain of RX at a certain temperature tested by experiment, RX depth with different load at this temperature can be forecasted.

A series of maleates with different metal cation were prepared, and their effects on PVC thermal stability were investigated in this work. The results show that maleates can improve the static stability and the colour stability of PVC on a high level, especially for maleic sodium and maleic zinc. The molecular structure and metal cation were thought to influence the stability effect of maleates. The thermal stability mechanism of maleates can be summarized as follows. Maleates can substitute or chelated the
unstable chlorines in PVC chains, or absorb HCl on the one hand, can react with the conjugating double bonds by the Diels-Alder reaction on the other hand.

Al–Si coating was deposited on a nickel-base super-alloy M951 by slurry technique. Isothermal and cyclic oxidation at 1100℃, hot corrosion behaviors in Na₂SO₄+25%K₂SO₄ and Na₂SO₄+25%NaCl at 850℃ were investigated. Morphologies and phase structure of the scale were analyzed by SEM, EDS and XRD. After isothermal and cyclic oxidation, mixed oxides of NiO, NiAl₂O_4, Nb₂O₅ and Al₂O₃ formed on the surface of the alloy, which spalled seriously during cyclic oxidation process. Stable α–Al₂O₃ scales were formed on the surface of Al–Si coating, which improve the oxidation resistance of the alloy significantly. Catastrophic corrosion occurred for the alloy after 40 hours in molten salts, while thin and continious θ–Al₂O₃ film formed on the surface of the coating, which provided effective protection for the alloy during the corrosion process.

Nanocomposite zinc-rich epoxy coatings with four kinds of curing agents for transmissionline steel structure were prepared. The corrosion resistance of the coatings was investigated by using salt spray tests, immersion tests and electrochemical impedance spectroscopy. Results show that a coating with a curing agent, phenolic amine, exhibited optimal corrosion resistance. Because this curing agent has structure of benzene rings, the coating showed excellent resistance to chemical media.

Iron and iodine single doped and co-doped TiO₂ nanocrystalline were prepared by the sol–gel method and investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy, respectively. The photocatalytic properties of the samples were evaluated by photocatalytic degrading methylene blue. The results show that all the samples are compose of the anatase phase and the average grain size is 7–15 nm. After the doping, the absorption properties of the samples obviously enhanced. After introducing I into TiO₂, the photocatalytic activity of the sample is greatly improved due to the decrease of grain size and extending of optical absorption region. With the increase of Fe doping level, the photocatalytic activities of the codoped samples increase and then decrease gradually. The best photocatalytic property is presented in the codoped sample with 0.2% Fe doping. The mechanisms of the photocatalytic property changes were further discussed by several factors such as grain size, absorption performance and band structure.

For studying the bonding and insulating properties of inorganic adhesive, different compositions of silicate adhesive samples were prepared in this paper. The morphologies of the solidified adhesives were observed by the microscope and SEM. The bonding force was determined by low-loaded tensile testing machine and the insulation resistance of sample was measured under various temperature and saturated vapor environment. The results indicated that the bonding-strength of sample is greatly improved by the decrescent SiO₂/M₂O modulus ratio of liquid composition, the wide sizes and distributions of the solid powders as well as the proper ratio between solid and liquid component. The insulating property of sample deteriorates with temperature rising, and sample with more content of alkali metal ion shows lower critical temperature and quicker downtrend. Sample’s insulating resistance obviously decreased when it was under saturated vapor environment, which might be greatly improved by heat treating, but it can also deteriorate by the increase of both alkali ion content and micro crack of adhesive.